Difference between revisions of "Optically trapped aqueous droplets for single molecule studies"

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(New page: Zach Wissner-Gross (May 2, 2009) ==Information== Optically trapped aqueous droplets for single molecule studies J. E. Reiner, A. M. Crawford, R. B. Kishore, Lori S. Goldner, K. Helmerson...)
 
(Soft matter keywords)
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==Soft matter keywords==
 
==Soft matter keywords==
Surface tension, optical trap
+
Surface tension, optical trapping
  
 
==Summary==
 
==Summary==
 
To optically trap microparticles, one requirement is that the particle have a higher index of refraction than its surrounding medium. While small plastics beads are easy to trap, water droplets are more difficult to to water's relatively low refractive index of 1.33. Reiner et al. overcome this difficulty by mixing water with a low-index (1.29) hydrophobic fluorocarbon medium, followed by ultrasonication to produce droplets approximately 2 <math>\mu</math>m in diameter.
 
To optically trap microparticles, one requirement is that the particle have a higher index of refraction than its surrounding medium. While small plastics beads are easy to trap, water droplets are more difficult to to water's relatively low refractive index of 1.33. Reiner et al. overcome this difficulty by mixing water with a low-index (1.29) hydrophobic fluorocarbon medium, followed by ultrasonication to produce droplets approximately 2 <math>\mu</math>m in diameter.

Revision as of 22:26, 2 May 2009

Zach Wissner-Gross (May 2, 2009)

Information

Optically trapped aqueous droplets for single molecule studies

J. E. Reiner, A. M. Crawford, R. B. Kishore, Lori S. Goldner, K. Helmerson

Applied Physics Letters, 2006, 89, 013904

Soft matter keywords

Surface tension, optical trapping

Summary

To optically trap microparticles, one requirement is that the particle have a higher index of refraction than its surrounding medium. While small plastics beads are easy to trap, water droplets are more difficult to to water's relatively low refractive index of 1.33. Reiner et al. overcome this difficulty by mixing water with a low-index (1.29) hydrophobic fluorocarbon medium, followed by ultrasonication to produce droplets approximately 2 <math>\mu</math>m in diameter.